gistfile1.java

    public static <T> List partition(List<T> list, int numPartitions, int minPerPartition) {
        ArrayList<List> partitions = new ArrayList<List>();
        int i = 0;
        int n = list.size();
        int numPerPartition = new BigDecimal(n).divide(new BigDecimal(numPartitions), 0, RoundingMode.CEILING).intValue();
        if (numPerPartition < minPerPartition) {
            numPerPartition = minPerPartition;
        }
        while(i < n) {
          int j = 0;
          List<T> partition = new ArrayList<T>();
          while (j < numPerPartition && (i + j) < n) {
            partition.add(list.get(i + j));
            j += 1;
          }
          partitions.add(partition);
          i += numPerPartition;
        }
        return partitions;
    }